7a-12=2a+8

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Solution for 7a-12=2a+8 equation: 



7a-12=2a+8

We move all terms to the left:

7a-12-(2a+8)=0

We get rid of parentheses

7a-2a-8-12=0

We add all the numbers together, and all the variables

5a-20=0

We move all terms containing a to the left, all other terms to the right

5a=20

a=20/5

a=4

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